We don't consider ___ necessary for them to more into that house?为什么空出填it?
问题描述：
We don't consider ___ necessary for them to more into that house?为什么空出填it?
答
it 是形式宾语 ,真正的宾语是to move into that house.
整句话意为：我们不认为他们有必要搬进那栋房子.